The legendary ring of Helen of Troy is said to have borne as its setting an astroites or star-gem taken from the head of a mysterious fish called pan, because in appearance it resembled the god Pan. Perhaps the gem was simply one of the head-stones existing in certain fishes of other species. This stone, which emitted rays of flame, was conceived to be a most potent love-charm, drawing to its wearer the love of anyone he, or she, might wish to fascinate, and the particular specimen of this strange gem which Helen wore was a signet, engraved with the image of the god by whose name the fish was called.[477] Among the rings miraculously found after they have apparently been irrevocably lost, was one of iron given to Seleucus I, Nicator (365–281 B.C.), whose wide dominions stretched from the western seaboard of Asia Minor to India. This prized ring was lost by chance near the river Euphrates, but was later recovered at the very spot where the ruler’s mother had predicted it would be found.[478] Whether this was revealed to her in dream or trance the recital does not state.[479] A talismanic bronze ring in the British Museum is set with an amethyst on which has been engraved a human eye, evidently a charm against the Evil Eye. This dread influence was also combated by a peculiar type of ring having gold nails or studs inserted in them. This is a Græco-Roman type of about 500 to 200 B.C., and does not appear to have gained favor with the Romans. In a large and massive gold ring of the late Roman period, the entire bezel has been given the form of an eye. This ring weighs 975 grains, or over two ounces; it was found in Tarsus, and belongs to the third Christian century.[480] In a few ancient rings gold and silver have been combined, as shown by a striking example in the British Museum, where the upper part of the hoop is of gold and the lower half of silver. This has been conjectured to have been designed to render the ring a talisman, the joining of gold and silver having a similar effect to that obtained by inserting a gold nail in the bezel of a silver ring. The bezel of the massive ring we have noted is set with a sard engraved in intaglio with the design of a shepherd seated on a rock.[481]